US soldiers are cowards, not brave risk takers or supersoldiers, but they don't need to looking how US fights. The whole myth (inflated, but not totally ungrounded) that even allow US military to even operate is the idea that they are so technologically ahead to everybody that nobody is in any actual risk of dying or getting hurt and military is just some field trip for poor kids to get college. I guess it's kinda of a bravery when your wars are all air campaigns and your bravest and most machho soldier is some F35 pilot firing standoff munitions to some school 200km away.

When it comes to wars US has all the freedom to choose target countries, that it thinks are weak, softened by sanctions and intelligence undermining, and not ready to put up much of fight. It has always been this way, and US isolated geography gives them this freedom to pick their battles, US never needs to play defense or think about long term consequences, since "war" is always something happens to somebody else somewhere else. The same goes for political imperative of American wars, any amount of bodies that can been seen coming back in coffins is too much.